Re: Spark check?
I was about to ask a similar question, so I thought I'd tack it onto this thread. I bought one of the little spark testers a few weeks ago. I tried it once when my motor was working, and got a dim spark that was rather hard to see in the sunlight, but it did spark.<br /> However I'm a bit confused about the proper way to use it. In my case, I have 2 spark plugs. I read that you are supposed to ground one lead, while testing spark on the other. Is this necessary? I figured that leaving the other plug wire in place should be OK, since if it's sparking, it would be conducting as good as a ground. Is this wrong?<br /> I also read something suggesting that if you cranked the engine with the plug wire off and not grounded, that damage to the electronics module could result. Why is this, and under what circumstances would it occur? It seems like if this were true, whenever a plug's gap got too big to spark, that you'd damage the module, which doesn't sound logical.<br /> But if you do have to ground plug wires you're not connecting, what is the best way to do this? A screwdriver into the connector or what? <br /> Thanks.
